Nineteen genera and 320-350 species: North and South America, a few species native to temperate Asia and Europe; one genus, Polemonium, and three species in China. Cobraea scandens Cavanilles (a perennial vine with violet campanulate corollas ca. 5 cm) and three species of Phlox, P. drummondii Hooker, P. paniculata Linnaeus, and P. subulata Linnaeus (herbs with white to red, salverform corollas and unequally inserted stamens), are cultivated in China.